# NTSB MIA90LA103: Swing Velocity RG, N125V, Wimauma, FL, April 11, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 11, 1990, 11:05 local (15:05 UTC)
- Place: Wimauma, FL
- Coordinates: 27.759504, -82.280616 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=27.7595&lon=-82.2806&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 10, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32646
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA90LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32646/pdf
- Page: https://openairdocs.org/ntsb/MIA90LA103

## Probable cause

DELAMINATION OF A PORTION OF ONE OF THE WOODEN PROPELLER BLADES AT A KNOT, RESULTING IN SEVERE VIBRATION AND NECESSITATING A FORCED LANDING.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, cruise - normal
  - propeller system/accessories,blade - delamination (cause)
- Forced landing, descent - emergency
  - terrain condition - none suitable
- Nose over, landing - roll

## Analysis

THE PLT STATED THAT DURING CRUISE FLT, HE FELT A SEVERE VIBRATION FROM THE REAR OF THE ACFT (THE ACFT WAS A PUSHER TYPE). HE SECURED THE ENG. AFTER TOUCHDOWN IN A FIELD DURING THE FORCED LANDING, THE ACFT ROLLED INVERTED & CAME TO REST. EXAM OF THE ACFT REVEALED THAT A PORTION OF ONE PROPELLER BLADE DELAMINATED AT A KNOT.

## Aircraft

- Registration: [N125V](https://openairdocs.org/deregistered/N125V-2013-09-20), registration cancelled 2013-09-20, S/N DM 074, built 1989 (OpenAirDocs)
- Reported make and model: SWING VELOCITY RG (VELOCITY R)
- Registry model: [Swing Brian S VELOCITY RG](https://openairdocs.org/model/swing-brian-s-velocity-rg) (registry code 0561655) (OpenAirDocs)
- Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: DM-074
- Airframe hours: 115
- Engines: LYCOMING IO-360 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Swing, Brian S.
- Registered owner: Swing, Brian S
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, April 5, 1990, 15 hours before
- Departed: LAL, LAKELAND, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 707 total, 70 in this make and model, 650 as pilot in command, 14 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 8 knots
- Visibility: 12 statute miles
- Lowest ceiling: 4,000 ft broken
- Temperature: 79 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: LAL, 25 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19900411011939A](https://openairdocs.org/incident/19900411011939A), Apr 11, 1990: Amtr VELOCITY, Lakeland, FL, Substantial damage. Vibration in rear engine. Nosed over landing in a field to check it out. Prop blade had delaminated at a knot.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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